Finding the Fourth Proportional to 957.83, 1,323.59 and 815.94

Step by Step Solution

1. Step 1: Write the proportion equation
   957.83 : 1,323.59 = 815.94 : x
2. Step 2: Convert to fraction form
   957.83/1,323.59 = 815.94/x
3. Step 3: Cross multiply
   957.83x = 1,323.59 × 815.94
4. Step 4: Simplify right side
   957.83x = 1,079,965.94
5. Step 5: Solve for x
   x = 1,079,965.94/957.83
6. Step 6: Final answer
   x = 1,127.52